Which of these recommended designs provides the highest availability?
A.
map the Layer 2 VLAN number to the Layer 3 subnet
B.
control route propagation to edge switches using distribute lists
C.
use a Layer 2 distribution interconnection link with HSRP or GLBP
D.
use a Layer 3 distribution interconnection link with HSRP or GLBP
E.
use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP
VLAN to subnet mapping is recommended, but the key is layer 3 interconnection between distribution switches with a FHRP. HSRP or GLBP would work.
The correct answer is D.
Tiso, John (2011-10-31). Designing Cisco Network Service Architectures (ARCH) Foundation Learning Guide: (CCDP ARCH 642-874) (3rd Edition) (Foundation Learning Guides) (Kindle Location 2239). Pearson Education. Kindle Edition.
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